Yes i used to have a single din sony dab unit but i bought a Kenwood DMX125DAB double din unit, it works great and the dab is spot on with the glass mount but theure bloody ugly and the pack of A pillar plastics to hide the cable and copper earth strip also really bugs me. I did look at getting a replacement aerial and replace the factory aerial on the rossa but really can't be arsed to drop the roof lining etc.
This dab splitter <- clicky ebay link, seems to have what these aerials have just behind the head unit instead of in the aerial itself, has a 12v power feed, then FM and dab aerials, for the sake of it im tempted to try it because i wouldnt have to remove the glass mount until i knew the new dab aerial worked.
Small tech question, if i was to use it could i connect the 12v to the headunit loom for Power Antenna (purple wire) or is it better just to scotch lock into the ignition wire?
The unit you picked up looks smooth and still very much factory like, but with dab would be a great addition.